Estudo clínico e anatomopatológico da cicatrização cutânea no gato doméstico: utilização do laser de baixa potência GaAs (904 nm)

Abstract

A pesquisa avalia a ação do laser de baixa potência Arseneto de Gálio (904 nm) em feridas cirúrgicas de pele de felinos. Utilizamos 63 animais divididos em 3 grupos: A - radiados com 4J/cm2 , B - radiados com 2J/cm2 e C - controle, não radiados. A aplicação da radiação foi única no pós-operatório imediato em feridas cirúrgicas de gatas submetidas a ovariohisterectomia por conveniência. Realizamos estudo macroscópico e de microscopia de luz (Hematoxilina e Eosina) nos tempos 2º, 4º, 8º e 15º dias de pós-operatório. Obtivemos clínica e microscopicamente resultados que sugerem um incremento na cicatrização das feridas radiadas quando comparado com o grupo controle e, se mostrando vantajosa ainda a radiação com 2J/cm2 em relação a 4J/cm2. Acreditamos, portanto ser o laser um adjuvante na cicatrização cutânea, podendo otimizar a evolução de feridas pós-cirúrgicas por primeira intenção nas condições e espécie animal estudada.<br>This research evaluates the action of the Galium Arsenide laser (904 nm) in feline cutaneous surgical wounds. We used 63 animals divided in 3 groups: A - radiated with 4J/cm2 , B - radiated with 2J/cm2 and C - control, not radiated. The aplication of the laser was accomplished in only one session in the immediate pos-operative procedures just after elective ovariohisterectomy. The macroscopical and microscopical analyses (Hematoxilin and Eosin) of the skin were performed in 2, 4, 8 and 15 days pos-operatively. As result we obtained clinical and microscopical increase in the radiated wounds compared with control group and the energy densitie 2J/cm2 was more efficient than 4J/cm2 . Therefore we believe that the laser device can be used as coadjuvant in the healing process of skin wounds, in addition to optimizing the evolution of first intention post-surgery skin wounds in the studied species and circunstances

The Ability of Low Level Laser Therapy to Prevent Muscle Tissue Damage Induced by Snake Venom

“…In recent years, several experimental studies have described the potential capacity of low-energy HeNe laser irradiation to increase the rate of regeneration in different tissues, such as connective (including cartilage and bone), epithelial, nervous and muscular (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18). In general the mechanisms by which laser irradiation interferes with these biologic processes have been only minimally addressed if at all.…”

Análise da dose do laser de baixa potência em equipamentos nacionais

“…Most studies on laser application for cicatrizing skin wounds show positive effects, as observed through the proliferation of fibroblasts and endothelial cells, and increased deposition of collagen and keratin 4,[12][13][14][15] . However, there is great variation in relation to the ΔE used, and the values found ranged from 1 to 21.4 J/cm 2 (12,15) .…”

Analysis of the healing process of the wounds occurring in rats using lasertherapy in association with hydrocolloid

“…It was observed that the animals that received laser application associated or not with the hydrocolloid dressings were more calm, suggesting an analgesic effect of the therapy 11 .…”